Variable-inductor electronic ballasts

Abstract

The invention discloses a fluorescent lamp system and a variable inductor applied to the fluorescent lamp system. The fluorescent lamp system comprises a fluorescent tube, and a variable-inductor electronic ballast. The variable-inductor electronic ballast comprises a generic electronic ballast and a variable-inductor controller. The variable-inductor controller is coupled to the generic electronic ballast and used for including an additional inductance or eliminating capacitance according to different situations to adjust the power of the fluorescent lamp system. In addition, a selective winding is added on the existing transformer to increase the power of the fluorescent lamp system. Because the variable-inductor electronic ballast simultaneously has the size and cost advantages of a general self-oscillation half-bridge electronic ballast, the variable-inductor electronic ballast not only makes a manufacturer of energy saving lamps quickly lay the lamps and extrally saves the energy at low cost by the user of the energy-savign lamps.

Description

technical field [0001] The present invention relates to a variable inductance applied to segmental dimming of a fluorescent lamp system, especially a variable inductance controller built in an existing electronic ballast, by changing the ballast inductance to A fluorescent lighting system and a variable inductor to adjust the power of the fluorescent lighting system. Background technique [0002] Usually, there is a self-oscillating half-bridge electronic ballast (hereinafter referred to as general electronic ballast) in the core of the energy-saving lamp (Compact Fluorescent Lamp, CFL) system to drive fluorescent tubes (also called gas discharge lamps) (gas discharge tube). figure 1 is a schematic diagram illustrating a prior art energy saving lamp system 10 with a fluorescent tube 11 terminated at node B (ground). Despite variations in termination, rectification, resonator, preheating, and EMI, all self-oscillating, half-bridge ballasts can be reduced to figure 1 operat...

AI Technical Summary

Problems solved by technology

But electronic ballasts incorporating integrated circuit controllers require expensive NMOS transistor switches to minimize the load on the integrated circuit controller, and to extend the operating frequency range of electronic ballasts for dimming purposes

In addition, the integrated circuit controller is also a complex power management system

Although fluorescent lighting systems with electronic ballasts combined with integrated circuit controllers can be dimmed, they are not cost-effective

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